Submission #2503747
Source Code Expand
#include <bits/stdc++.h> #define int long long using namespace std; vector<vector<int> > data; int win, INF = -1e9; vector<bool> used; pair<int, int> dfs(int vertex, vector<bool> &v){ used[vertex] = true; if (data[vertex].size() == 1){ int cst = 1 + (!v[vertex]) - (v[vertex]); win = max(win, cst); return make_pair(cst, INF); } int maxl = INF, maxl2 = INF, maxr = INF, maxr2 = INF; int A = -1, B = -1; for (int i=0; i < data[vertex].size(); i++){ int to = data[vertex][i]; if (used[to]) continue; pair<int, int> p = dfs(to, v); int L = p.first, R = p.second; if (L > maxl){ A = i; maxl2 = maxl; maxl = L; } else if (L > maxl2) maxl2 = L; if (R > maxr){ B = i; maxr2 = maxr; maxr = R; } else if (R > maxr2) maxr2 = R; } int cst = 1 + (!v[vertex]) - (v[vertex]); win = max(win, cst); if (A != B) win = max(win, maxl + maxr + cst); else{ win = max(win, maxl2 + maxr + cst); win = max(win, maxr2 + maxl + cst); } maxl += cst; maxr += cst; maxr = max(maxr, cst); return make_pair(maxl, maxr); } signed main(){ ios_base::sync_with_stdio(false); cin.tie(0); int n; cin >> n; for (int i=0; i < n; i++){ vector<int> help; data.push_back(help); } for (int i=0; i < n-1; i++){ int a, b; cin >> a >> b; data[a-1].push_back(b-1); data[b-1].push_back(a-1); } vector<bool> good; for (int i=0; i < n; i++){ char ch; cin >> ch; if (ch == 'W') good.push_back(false); else good.push_back(true); } vector<int> f; for (int i=0; i < n; i++) f.push_back(data[i].size()); vector<bool> rem(n); fill(rem.begin(), rem.end(), true); queue<int> q; for (int i=0; i < n; i++) if (f[i] <= 1 && good[i]) q.push(i); while (q.size()){ int V = q.front(); q.pop(); rem[V] = false; for (int i=0; i < data[V].size(); i++){ int to = data[V][i]; f[to]--; if (f[to] == 1 && good[to]) q.push(to); } } map<int, int> num; int cur = 0; for (int i=0; i < n; i++){ if (!rem[i]) continue; num[i] = cur; cur++; } vector<vector<int> > ndata; for (int i=0; i < n; i++){ if (!rem[i]) continue; vector<int> ss; for (int j=0; j < data[i].size(); j++){ int to = data[i][j]; if (!rem[to]) continue; ss.push_back(num[to]); } ndata.push_back(ss); } data=ndata; vector<bool> ngood; for (int i=0; i < n; i++){ if (!rem[i]) continue; ngood.push_back(good[i]); } good = ngood; if (data.size() == 0){ cout << 0; return 0; } if (data.size() == 1){ cout << 1; return 0; } if (data.size() == 2){ cout << 2; return 0; } int ft = -1; for (int i=0; i < data.size(); i++) if (data[i].size() > 1) ft = i; for (int i=0; i < data.size(); i++) used.push_back(false); for (int i=0; i < data.size(); i++) if (data[i].size() % 2) good[i] = good[i] ^ 1; int pay = 2*data.size()-2; for (int i=0; i < data.size(); i++) if (!good[i]) pay++; win = 0; dfs(ft, good); cout << pay - win; }
Submission Info
Submission Time | |
---|---|
Task | F - Monochrome Cat |
User | DmitryGrigorev |
Language | C++14 (GCC 5.4.1) |
Score | 800 |
Code Size | 3597 Byte |
Status | AC |
Exec Time | 238 ms |
Memory | 29552 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 800 / 800 | ||||
Status |
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Set Name | Test Cases |
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Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt, 1_015.txt, 1_016.txt, 1_017.txt, 1_018.txt, 1_019.txt, 1_020.txt, 1_021.txt, 1_022.txt, 1_023.txt, 1_024.txt, 1_025.txt, 1_026.txt, 1_027.txt, 1_028.txt, 1_029.txt, 1_030.txt, 1_031.txt, 1_032.txt, 1_033.txt, 1_034.txt, 1_035.txt, 1_036.txt, 1_037.txt, 1_038.txt, 1_039.txt, 1_040.txt, 1_041.txt, 1_042.txt, 1_043.txt, 1_044.txt, 1_045.txt, 1_046.txt, 1_047.txt, 1_048.txt, 1_049.txt, 1_050.txt, 1_051.txt, 1_052.txt, 1_053.txt, 1_054.txt, 1_055.txt, 1_056.txt, 1_057.txt, 1_058.txt, 1_059.txt, 1_060.txt, 1_061.txt, 1_062.txt, 1_063.txt, 1_064.txt, 1_065.txt, 1_066.txt, 1_067.txt, 1_068.txt, 1_069.txt, 1_070.txt, 1_071.txt, 1_072.txt, 1_073.txt, 1_074.txt, 1_075.txt, 1_076.txt, 1_077.txt, 1_078.txt, 1_079.txt, 1_080.txt, 1_081.txt, 1_082.txt, 1_083.txt, 1_084.txt, 1_085.txt, 1_086.txt, 1_087.txt, 1_088.txt, 1_089.txt, 1_090.txt, 1_091.txt, 1_092.txt, 1_093.txt, 1_094.txt, 1_095.txt, 1_096.txt, 1_097.txt, 1_098.txt, 1_099.txt, 1_100.txt, 1_101.txt, 1_102.txt, 1_103.txt, 1_104.txt, 1_105.txt, 1_106.txt, 1_107.txt, 1_108.txt, 1_109.txt, 1_110.txt, 1_111.txt, 1_112.txt, 1_113.txt, 1_114.txt, 1_115.txt, 1_116.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 1 ms | 256 KB |
0_001.txt | AC | 1 ms | 256 KB |
0_002.txt | AC | 1 ms | 256 KB |
0_003.txt | AC | 1 ms | 256 KB |
1_003.txt | AC | 1 ms | 256 KB |
1_004.txt | AC | 1 ms | 256 KB |
1_005.txt | AC | 1 ms | 256 KB |
1_006.txt | AC | 1 ms | 256 KB |
1_007.txt | AC | 1 ms | 256 KB |
1_008.txt | AC | 1 ms | 256 KB |
1_009.txt | AC | 1 ms | 256 KB |
1_010.txt | AC | 1 ms | 256 KB |
1_011.txt | AC | 1 ms | 256 KB |
1_012.txt | AC | 1 ms | 256 KB |
1_013.txt | AC | 1 ms | 256 KB |
1_014.txt | AC | 1 ms | 256 KB |
1_015.txt | AC | 1 ms | 256 KB |
1_016.txt | AC | 1 ms | 256 KB |
1_017.txt | AC | 1 ms | 256 KB |
1_018.txt | AC | 1 ms | 256 KB |
1_019.txt | AC | 1 ms | 256 KB |
1_020.txt | AC | 1 ms | 256 KB |
1_021.txt | AC | 1 ms | 256 KB |
1_022.txt | AC | 1 ms | 256 KB |
1_023.txt | AC | 1 ms | 256 KB |
1_024.txt | AC | 1 ms | 256 KB |
1_025.txt | AC | 1 ms | 256 KB |
1_026.txt | AC | 1 ms | 256 KB |
1_027.txt | AC | 1 ms | 256 KB |
1_028.txt | AC | 1 ms | 256 KB |
1_029.txt | AC | 1 ms | 256 KB |
1_030.txt | AC | 1 ms | 256 KB |
1_031.txt | AC | 1 ms | 256 KB |
1_032.txt | AC | 1 ms | 256 KB |
1_033.txt | AC | 1 ms | 256 KB |
1_034.txt | AC | 1 ms | 256 KB |
1_035.txt | AC | 1 ms | 256 KB |
1_036.txt | AC | 1 ms | 256 KB |
1_037.txt | AC | 1 ms | 256 KB |
1_038.txt | AC | 1 ms | 256 KB |
1_039.txt | AC | 1 ms | 256 KB |
1_040.txt | AC | 1 ms | 256 KB |
1_041.txt | AC | 1 ms | 256 KB |
1_042.txt | AC | 1 ms | 256 KB |
1_043.txt | AC | 1 ms | 256 KB |
1_044.txt | AC | 1 ms | 256 KB |
1_045.txt | AC | 55 ms | 9332 KB |
1_046.txt | AC | 72 ms | 11252 KB |
1_047.txt | AC | 48 ms | 7408 KB |
1_048.txt | AC | 36 ms | 6000 KB |
1_049.txt | AC | 157 ms | 20976 KB |
1_050.txt | AC | 117 ms | 16372 KB |
1_051.txt | AC | 110 ms | 17904 KB |
1_052.txt | AC | 12 ms | 2936 KB |
1_053.txt | AC | 33 ms | 7280 KB |
1_054.txt | AC | 13 ms | 3316 KB |
1_055.txt | AC | 109 ms | 17648 KB |
1_056.txt | AC | 17 ms | 4084 KB |
1_057.txt | AC | 3 ms | 640 KB |
1_058.txt | AC | 65 ms | 10740 KB |
1_059.txt | AC | 17 ms | 3188 KB |
1_060.txt | AC | 35 ms | 6768 KB |
1_061.txt | AC | 169 ms | 20336 KB |
1_062.txt | AC | 52 ms | 8820 KB |
1_063.txt | AC | 103 ms | 12020 KB |
1_064.txt | AC | 44 ms | 6644 KB |
1_065.txt | AC | 3 ms | 704 KB |
1_066.txt | AC | 34 ms | 7280 KB |
1_067.txt | AC | 22 ms | 4088 KB |
1_068.txt | AC | 36 ms | 6260 KB |
1_069.txt | AC | 37 ms | 5112 KB |
1_070.txt | AC | 63 ms | 8308 KB |
1_071.txt | AC | 44 ms | 7024 KB |
1_072.txt | AC | 24 ms | 4340 KB |
1_073.txt | AC | 12 ms | 2172 KB |
1_074.txt | AC | 5 ms | 1088 KB |
1_075.txt | AC | 70 ms | 8692 KB |
1_076.txt | AC | 157 ms | 17776 KB |
1_077.txt | AC | 39 ms | 7664 KB |
1_078.txt | AC | 14 ms | 2552 KB |
1_079.txt | AC | 67 ms | 8564 KB |
1_080.txt | AC | 52 ms | 6772 KB |
1_081.txt | AC | 238 ms | 24560 KB |
1_082.txt | AC | 222 ms | 26608 KB |
1_083.txt | AC | 55 ms | 7536 KB |
1_084.txt | AC | 48 ms | 8048 KB |
1_085.txt | AC | 227 ms | 25840 KB |
1_086.txt | AC | 230 ms | 29552 KB |
1_087.txt | AC | 145 ms | 20464 KB |
1_088.txt | AC | 93 ms | 14192 KB |
1_089.txt | AC | 40 ms | 8688 KB |
1_090.txt | AC | 38 ms | 8304 KB |
1_091.txt | AC | 164 ms | 20848 KB |
1_092.txt | AC | 39 ms | 8304 KB |
1_093.txt | AC | 217 ms | 24432 KB |
1_094.txt | AC | 173 ms | 22896 KB |
1_095.txt | AC | 48 ms | 8048 KB |
1_096.txt | AC | 46 ms | 8304 KB |
1_097.txt | AC | 217 ms | 22896 KB |
1_098.txt | AC | 146 ms | 19696 KB |
1_099.txt | AC | 184 ms | 19824 KB |
1_100.txt | AC | 126 ms | 14960 KB |
1_101.txt | AC | 43 ms | 8432 KB |
1_102.txt | AC | 47 ms | 8048 KB |
1_103.txt | AC | 186 ms | 19696 KB |
1_104.txt | AC | 82 ms | 12016 KB |
1_105.txt | AC | 200 ms | 19440 KB |
1_106.txt | AC | 167 ms | 18416 KB |
1_107.txt | AC | 51 ms | 8048 KB |
1_108.txt | AC | 47 ms | 8560 KB |
1_109.txt | AC | 207 ms | 19312 KB |
1_110.txt | AC | 128 ms | 14064 KB |
1_111.txt | AC | 218 ms | 19696 KB |
1_112.txt | AC | 161 ms | 17648 KB |
1_113.txt | AC | 48 ms | 8432 KB |
1_114.txt | AC | 51 ms | 8048 KB |
1_115.txt | AC | 214 ms | 19568 KB |
1_116.txt | AC | 130 ms | 13808 KB |